GLP-1 receptors

Sitagliptin phosphate is an anti-diabetic (antihyperglycemic) drug of the dipeptidyl peptidase-4 (DPP-4) class. Inhibition of the enzyme DPP-4 is thought to increase Glucagon-like peptide-1 (GLP-1) which inhibits glucagon release , stimulates the insulin release and lowers blood glucose.

Linagliptin is a DPP-4 inhibitor, an enzyme that degrades the incretin hormones glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP).

Vildagliptin (LAF237 dihydrate;NVP-LAF 237 dihydrate) is a dipeptidyl peptidase 4 (DPP4) inhibitor that delays the degradation of glucagon-like peptide-1 (GLP-1).